Tens device



FIG. 1 is a bottom view of a TENS device;

FIG. 2 is a side view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a side view thereof; and,

FIG. 6 is a back view thereof.

The broken lines in the drawings depict portions of the article that form no part of the claimed design. 

CLAIM The ornamental design for a TENS device, as shown and described. 